/Engine/Plugins/Runtime/MeshModelingToolset/Source/ModelingComponents/Public/Selection/MeshTopologySelector.h
FTopologyProviderprovides selectable edge/group/corner information forFMeshTopologySelectorto use. Users should implement a concrete subclass based on the type of mesh topology they wish to make selectable (e.g. group topology, boundary curves, etc.). Then creating a new TopologySelector subclass should be fairly trivial.
class FTopologyProvider